Miscellaneous notes broadly relating to Welsh and Glamorgan history, Welsh literature and related subjects. They comprise: bundles of loose papers (T3/1-2) and notebooks (T3/3-14) containing notes and memoranda on a variety of historical subjects, including Bonedd y Saint; notebooks and loose notes on Welsh poetry and poets (T3/15-18); miscellaneous notes on sayings, idioms, etc. (T3/19); a few recipes for ink and toothache (T3/20); miscellaneous fragments, together with three maps drawn on tissue paper (T3/21); a bundle of annotated wrappers used by Taliesin to sort some of his and his father's papers (T3/22 – see also T13/7); six booklets, 1838-1839, containing extracts from manuscripts relating to Wales at the British Museum and Bodleian Library (T3/23); a bundle of foolscap sheets containing mostly genealogical texts relating to Welsh saints and legendary figures (T3/24); and a transcript of a lecture on Oriental languages 'Delivered by Professor [Duncan] Forbes at K[ing's] C[ollege] London', November 1837 (T3/25).

Notes on the antiquities and history of Anglesey, Brecknockshire, Glamorgan, etc.

A notebook purchased at the sale of the library of Theophilus Jones , historian of Brecknockshire, being a miscellany containing, among other things, 'Catalogus libror. meor. An[n]o 1643 ...', extracts from works on religion, a copy of 'The man[n]er of the winning of Glamorgan out of the Welsh mens hands by Sr Robert fitz Hamon and his followers ...', pedigrees mainly of Glamorgan families, 'An alphabet of some coates of armes in Wales and the borders of the same', details of some Glamorgan fee-farm rents, etc.

A copy of John Montgomery Traherne: Historical Notices of Sir Matthew Cradock, Knt. of Swansea, in the Reigns of Henry VII and VIII ... (Llandovery, 1840), interleaved, with manuscript additions and corrections by the author, facsimiles of autographs, original sketches, press cuttings, etc.

A copy of John Montgomery Traherne: Historical Notices of Sir Matthew Cradock ..., 1840, interleaved, with a few corrections and additions by the author.

Material collected by John Montgomery Traherne in connection with the preparation of his monograph on Sir Matthew Cradock. It includes pedigrees and notes, a transcript and English translation by Taliesin Williams ('Ab Iolo') of 'Dyma Ganu a wnaeth Rhys Brydydd i Syr Mathias Caradog am y Cwrdd Prydyddion a wnaeth efe yn y Merthyr Mawr', sketches, coats of arms, a letter, 1840, to Traherne from George Grant Francis, etc.

Notes on the history of Glamorgan written by Evan Jones ('Ieuan Gwynedd').

The author's copy, interleaved, with numerous manuscript and other additions, of Stradling Correspondence: A Series of Letters written in the Reign of Queen Elizabeth, with Notices of the Family of Stradling of St. Donat's Castle, Co. Glamorgan. Edited by the Rev. John Montgomery Traherne ... (London, 1840). Among the additions are notes and memoranda by John Montgomery Traherne, facsimiles of autographs, sketches of monuments and memorials, coats of arms, bookplates, autograph letters (including one from Agnes Strickland), etc., and a document, 1602, bearing the autographs of Thomas Mansell and W. Pryce.

'Contributions towards a History of Glamorgan' by G. T. Clark, being printed articles, manuscript notes and memoranda, autograph letters from Thomas Stephens, William Floyd, Alfred Ollivant (bishop of Llandaff), and others, etc.

Darlithoedd ac erthyglau'n ymwneud â hanes a thraddodiadau Morgannwg, gan gynnwys 'Bro Morgannwg, ei Hanes a'i Thraddodiadau', 'Haneswyr Cynnar Morgannwg', 'Gwlad Iolo', 'Glamorgan Customs in the Eighteenth Century', 'Cyfraniad Morgannwg i Fywyd Diwylliannol Cymru' a 'Brut Aberpergwm'.